Job Openings Fullstack Engineer

About the job Fullstack Engineer

Our client, a new Silicon Valley based profitable B2C product startup building innovative mobile solutions for the planet, is now looking for a talented and experienced Fullstack Engineer.

Location: Europe
Type: Remote, Full-time
Start date: ASAP
About Company:

Headquartered in Silicon Valley, the company boasts a leadership and investor team with former executives from Rakuten and Dropbox. Its flagship product, a VPN service, is a leading solution downloaded more than 100M times a year, ensuring online privacy and anonymity for users by creating a private network from a public internet connection. Its eSIM brand provides seamless global connectivity for travelers and digital nomads. 
The company operates fully remotely, with a strong presence in Singapore, Hong Kong, Poland, and Ukraine.

About Project:

It`s a modern subscription-based VPN service platform serving users across multiple platforms (iOS, Android, Windows, macOS). The web application handles user authentication, subscription management, payment processing, and integrates with various third-party services. The platform supports 15+ languages and serves a global user base.

Responsibilities:

  • Build & maintain full-stack features across our Next.js application
  • Develop API endpoints for mobile clients (iOS, Android, Windows, macOS)
  • Integrate payment systems (Recurly, App Store, Google Play)
  • Write clean, type-safe code with TypeScript
  • Implement i18n for new features across 15+ locales
  • Write and maintain E2E tests with Playwright
  • Optimize performance for global users with varying network conditions
  • Collaborate with mobile teams on API contracts and data synchronization
  • Monitor & debug production issues using Datadog and ClickHouse analytics

Requirements:  

  • 3+ years of experience with React and Node.js/TypeScript
  • Strong experience with Next.js (App Router preferred)
  • Experience with REST API design and implementation
  • Familiarity with payment/subscription systems (Stripe, Recurly, or similar)
  • Experience with SQL databases and analytics tools
  • Understanding of authentication & authorization (JWT, sessions)
  • Good knowledge of CSS/Tailwind for responsive UI development
  • Experience writing automated tests (unit, integration, or E2E)   

Nice to Have:    

  • Experience with GraphQL / Hasura

  • Familiarity with Cloudflare Workers or edge computing

  • Experience with ClickHouse or similar OLAP databases

  • Knowledge of App Store / Google Play in-app purchase flows

  • Experience with SendGrid or other email service providers
  • Familiarity with i18n best practices for global applications
  • Experience with Playwright or similar E2E testing frameworks

Why Join:

  • Work on a product used by millions of users worldwide
  • Modern tech stack with the latest versions of React, Next.js, and TypeScript
  • Opportunity to work on cross-platform integrations (web, iOS, Android, desktop)
  • Exposure to payment systems, analytics pipelines, and global infrastructure
  • Collaborative environment with mobile and backend teams

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